AGREEMENT REGARDING JOINT FILING OF SCHEDULE 13G

EXHIBIT 2

AGREEMENT REGARDING JOINT FILING OF SCHEDULE 13G

The undersigned, being duly authorized thereunto, hereby execute this agreement as an exhibit to this Schedule 13G to evidence the agreement of the below-named parties, in accordance with the rules promulgated pursuant to the Securities Exchange Act of 1934, to file this Schedule jointly on behalf of each such party.

Date: February 12, 2020

NEW LEAF VENTURES II, L.P.
By:		NEW LEAF VENTURE ASSOCIATES II, L.P.
		Its General Partner
		By:		NEW LEAF VENTURE MANAGEMENT II, L.L.C.
				Its General Partner
		By:		/s/ Xxxxx X. Xxxxxxxx
				Xxxxx X. Xxxxxxxx
				Chief Financial Officer
NEW LEAF VENTURE ASSOCIATES II, L.P.
By:		NEW LEAF VENTURE MANAGEMENT II, L.L.C.
		Its General Partner
		By:		/s/ Xxxxx X. Xxxxxxxx
				Xxxxx X. Xxxxxxxx
				Chief Financial Officer
NEW LEAF VENTURE MANAGEMENT II, L.L.C.
By:		/s/ Xxxxx X. Xxxxxxxx
		Xxxxx X. Xxxxxxxx
		Chief Financial Officer
*
Xxxxx X. Xxxxx
*
Xxxxxx X. Xxxx
NEW LEAF BIOPHARMA OPPORTUNITIES II, L.P.
By:		NEW LEAF BPO ASSOCIATES II, L.P.
		Its General Partner
		By:		NEW LEAF BPO MANAGEMENT II, L.L.C.
				Its General Partner
		By:		/s/ Xxxxx X. Xxxxxxxx
				Xxxxx X. Xxxxxxxx
				Chief Financial Officer

NEW LEAF BPO ASSOCIATES II, L.P.
By:		NEW LEAF BPO MANAGEMENT II, L.L.C.
		Its General Partner
		By:		/s/ Xxxxx X. Xxxxxxxx
				Xxxxx X. Xxxxxxxx
				Chief Financial Officer
NEW LEAF BPO MANAGEMENT II, L.L.C.
By:		/s/ Xxxxx X. Xxxxxxxx
		Xxxxx X. Xxxxxxxx
		Chief Financial Officer

/s/ Xxxxx X. Xxxxxxxx

* Xxxxx X. Xxxxxxxx

As attorney-in-fact

* This Schedule 13G was executed by Xxxxx X. Xxxxxxxx on behalf of the individuals listed above pursuant to Powers of Attorney. Note that copies of the applicable Powers of Attorney are already on file with the appropriate agencies.